Real-time intermembrane force measurements and imaging of lipid domain morphology during hemifusion
Real-time intermembrane force measurements and imaging of lipid domain morphology during hemifusion
复制标题
半融合过程中实时膜间力测量和脂质域形态成像
DOI:
--
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发表时间:
2015
影响因子:
16.6
通讯作者:
J. Israelachvili
中科院分区:
文献类型:
--
作者:
Dong Woog Lee;K. Kristiansen;Stephen H. Donaldson Jr.;Nicholas A Cadirov;X. Banquy;J. Israelachvili
Membrane fusion is the core process in membrane trafficking and is essential for cellular transport of proteins and other biomacromolecules. During protein-mediated membrane fusion, membrane proteins are often excluded from the membrane–membrane contact, indicating that local structural transformations in lipid domains play a major role. However, the rearrangements of lipid domains during fusion have not been thoroughly examined. Here using a newly developed Fluorescence Surface Forces Apparatus (FL-SFA), migration of liquid-disordered clusters and depletion of liquid-ordered domains at the membrane–membrane contact are imaged in real time during hemifusion of model lipid membranes, together with simultaneous force–distance and lipid membrane thickness measurements. The load and contact time-dependent hemifusion results show that the domain rearrangements decrease the energy barrier to fusion, illustrating the significance of dynamic domain transformations in membrane fusion processes. Importantly, the FL-SFA can unambiguously correlate interaction forces and in situ imaging in many dynamic interfacial systems. During membrane fusion, lipid bilayers come into direct contact but rearrangements of lipid domains during fusion have not been thoroughly examined. Here the authors observe and correlate membrane morphology, interaction forces and domain rearrangements during hemifusion of two model membranes.
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影响因子:
3.4
作者:
Banquy, Xavier;Kristiansen, Kai;Lee, Dong Woog;Israelachvili, Jacob N.
通讯作者:
Israelachvili, Jacob N.
影响因子:
56.9
作者:
J. Zasadzinski;R. Viswanathan;L. Madsen;J. Garnæs;D. K. Schwartz
通讯作者:
J. Zasadzinski;R. Viswanathan;L. Madsen;J. Garnæs;D. K. Schwartz
DOI:
10.1016/j.tcm.2003.10.002
发表时间:
2004
期刊:
Trends in cardiovascular medicine.
影响因子:
--
作者:
O'Connell,KristenMS;Martens,JeffreyR;Tamkun,MichaelM
通讯作者:
Tamkun,MichaelM
影响因子:
3.4
作者:
Stottrup,BenjaminL;Veatch,SarahL;Keller,SarahL
通讯作者:
Keller,SarahL
影响因子:
3.4
作者:
Veatch, SL;Keller, SL
通讯作者:
Keller, SL